Depending on a number of factors( and who you ask) a 904 is going to ET anywhere from 1 to 2 tenths quicker.
I think about 1.5 is probably more common than any other, that i have heard of.
A few years back i swapped out a basic 727 with stock internals, for a full roller unit with an aluminum drum, lightened sunshell, etc.
The new trans proved to be ultra reliable, but i saw nothing on the ET slip from the torrington bearings, lightened internals, etc.
Long stort short, no matter what is done to a 727, its in fact going to be a good bit slower than a 904.
might want to check with SMR regarding a billet steel 904 drum.
His site seems to imply he has them
Last edited by B3422W5; 04/21/10 06:15 PM.